/ Dictionary / Index A Assumptionist: Meaning and Definition of Find definitions for: As•sump•tion•ist Pronunciation: (u-sump'shu-nist), [key] — n. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. assumption assumptive Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language